Door closing and checking mechanism.



B, W. 6MB. D008 CLOSING AND CHECKING MECi-IANISNL APPLICATION FILED JUNE 4. I914- INVENTOR.

w ad, ATTORNEYS.

WITNESSES 6am j affifiz %%QMMN UNITED %TATE% PATENT BLAIR w. earn, or cnrcaeo, rLLInoIs.

noon oLosIne AND CHECKING MECHANISM.

To dllwkom it may concern: I I Be it known that I, BLAIR WLGA'IR, a citizen of the United States, residing at Chi cago, in the county OfrCOOk and State of Illinois, have invented certain new and use ful Improvements in Door Closing v and Checking, Mechanism, of which thefollow ing is a description. a

My invention belongs to that general class of devices for controlling doors, and relates particularly to a mechanism of but few parts arranged to be preferably positioned in the floor and operatively connected with a single or double acting swing door. The invention. has among its ob ects the productlon of a. device of the kind described that 1s ex,

tremely simple and compact, and constructed to be adjusted and regulated so as to make the same applicable for practically any installation regardless of the conditions. The invention has among its further objects the production of a durable,eliicient and satisfactory door mechanism for use wherever found applicable. v I 1 Tothis end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and. more particularly pointed out in the claims. 1

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a sectional view of my improved device taken substantially on line 1, 1 of Fig. 2;

Fig. 2 is a sectional view taken .substan tially on line 2, 2 of Fig.1; 1 1

Fig. 3 is a sectional viewtaken substantially on line 3, 3 of Fig. 1, and a Fig. 4 is a sectional view taken substantiallyon line 4, 4 of Fig. 1. 1

Referring to the drawings, in which the preferred form of my device is shown, 1 represents a suitable casing, which is preferably suitably secured to or in the floor of a structure. The casing is provided with chambers 3, 3, divided by a cross partition 2 and l, the chambers beingnormally closed by removable plugs or ends 5, 5. It may be mentioned that the casing and plugs are preferably so constructed that the device may contain any suitable fluid, as for example, oil, without danger of the same leak 1 ing out. Projecting from the casing 1 is a shaft 6, which is adapted tobe suitably se- "puma to a door, as will be hereafter de- Specification of Letters Patent. if Application filed June 4, 1914. Serial No. 842,861.

Patented Jan.1l5,191&

scribed. Shaft 6 is provided with a gear segment 7, having teeth formed thereon, the same being arranged as at 8 and 9 to be rotatably carried by the casing, and by a bearing member. 10, as most clearly shown in Fig. 2.

Arranged in each chamber 3 of the casing isa plunger 12, the plunger being preferably cut away as most clearly shown in Fig. 1, provided with teeth arranged to mesh with the teeth on the gear segment 7. It will be noted by referring toFig. 1 that one tooth to each plunger is partially cut away as at 12' so as to clear the tooth of the gear segment adjacent to it, when the gear segment is in operative engagement.

nut 15, which isarranged on a bolt 16. The

bolts 16 extend to the exterior of the plugs 5, and are rotatably carried thereby. Washers 17 preferably secured to the bolts, maintain the same from longitudinal movement when the bolts 16 are turned, thereby increasing or decreasing the tension of the spring members 14. Each plunger is preferably provided with a port 18, through the end there of, as shown, having a valve member 19 arranged to permit the passage of fluid from the inside to the exterior side of the end of the plunger. Any type of check valve may be used, that shown consisting of a ball 19.

The partition at is preferably provided with a duct 20 for each plunger, extending to proximate the end of the casing, the same being connected by a duct 21 to the chamber, as shown in Fig. 1. The passage of fluid through the'ducts20 and 21 is preferably controlled by needle valves 22, or their equivalents for the purpose. In addition to a the ducts shown, I preferably connect the two chambers by a duct 24. (see Figs. 2 and 3) the passage of fluid therethrough being normally controlled by a needle valve 25, or its equivalent. In the partition 2 I preferably provide an opening or port 26, connecting the two chambers and an additional port 27, the passage of fluid through the latmesses a partition extending lengthwise thereof, forming a plurality of chambers, a closure for each chamber, a plunger arranged in each chamber, each of said plungers provided with a pluralityof teeth thereon and witha valved ductat one'end, means for yieldingly maintaining said plungers at one end of each of their vrespective chambers, said partition at said plunger end of the casing provided with a duct for each chamber extending from the end of the casing toward the other end, and opening into said chambers, and with a duct extending through the partition connecting the plunger chambers, and means for controlling the passage of fluid through said ducts, a gear, segment arranged in said casing and arranged to engage either plunger independently of the other, said gear segment provided with a shaft projecting to the exterior of the casing and arranged for attachment with a movable part.

5. The combination in a device of the kind described of a casing provided with a partition extending lengthwise thereof from each end, forming a plurality of chambers, a detachable closure for each chamber, a plunger arranged in each member, each of said plungers provided with a plurality of teeth thereon and with a valved duct at one end, adjustable means controllable from the exterior of the casing for yieldingly maintaining said plungers at one end of each of their respective chambers, said partition at said plunger end of the casing provided with a duct for each chamber extending from the end of the casing toward the other end, and opening into said chambers, and with a duct extending through the partition connecting the plunger chambers, and means for controlling the passage of fluid through said ducts, a gear-segment arranged in said casing and arranged to engage either plunger independently of the other, said gear segment provided with a shaft projecting to the exterior of the casing and arranged for attachment with a movable part.

6. The combination in a device of the kind described of a casing provided with a partition extending lengthwise thereof, forming a plurality of chambers, a closure for each chamber, a plunger arranged in each chamber, each of said plungers provided With a plurality of teeth thereon and with a valved duct at one end, means for yieldingly maintaining said plungers at one end of each of their respective chambers, said partition at said plunger end of the casing provided with a duct for each chamber extending from the end of the casing toward the other end, and opening into said chambers, and with a duct extending through the partition connecting the plunger chambers, and means for controlling the passage of fluid through said ducts, the partition at the opposite end in, divided by a suitable partition,

of the casing provided with a plurality of ducts therethrough, and means for controlling the passage of fluid through one of said ducts, a gear se ment arranged in said casing and arranged to engage either plunger independently of the other, said gear segment provided with a shaft projecting to the exterior of the casing and arranged for attachment with a movable part. i 1 7. The combination in a device of thekind described of an oil containing casing provided with, a plurality of chambers therein, and With closures for the ends of said chambers, a plunger arranged in each chamber at the end opposite saidclosures, means for resiliently maintaining said plungers at the ends of their respective chambers including an adjustable member extended through each closure, a shaft extending into said casing and provided with means for directly engaging either of said plungers, means for controlling the operation of either plunger after a predetermined travel of the same when actuated by said shaft, and means for controlling the return of said plungers to normal position when returned by said resilient means;

8. The combination in a checking device of a casing having a plurality of adjacent communicating chambers, a plunger arranged in each chamber, adjustable means for yieldingly maintaining said plungers in operative position, said plungers cut away on adjacent sides, and formed with gear teeth therein, a gear segment arranged within the casing and provided with teeth arranged to engage with the teeth on said plungers, and means for controlling the movement of said plungers in either direction.

9. The combination in a checking device of a casing having a plurality of adjacent communicating chambers, a plunger arranged in each chamber, adjustable means for yieldingly maintaining said plungers in operative position, said plungers cut away on adjacent sides, and formed with gear teeth therein, a portion of one tooth on each plunger partially cut away, a gear segment arranged within the casing and provided with teeth arranged to engage with the teeth on said plungers, said gear segment having a flat face at one side, and said plungers overlying said face, and means for controlling the movement of said plungers in either direction.

10. In a door closer and check, the combination of a suitable oil containing casing provided with a plurality of chambers therea plunger arranged in each chamber, said partition provided with a plurality of ducts extending proximate the end of the chambers to the end of the partition, means for controlling the passage of the fluid through said ducts, said partition provided with a duct connecting Ithe plunger chambers, means' for controlling the passage of fluidthrough said last mentioned duct, means for normally maintaining said plungers vat the end of their respective chambers, and a shaftprojecting from Within the chamber to the extenior thereof, said shaft provided with means for engaging eitherof said plnngers.

'11. The combination in a door closing and checking device with an oil containing casing provided with oil containing chambers, conveying ducts therein, a plunger arranged in each chamber, means for yieldingly opposing the movement of the plungers and maintaining the same-in normal positions,

eomprisinga spring for-each plungerymeans Y extending to the -eXte"1*io1"- of the easing fo'l' independently -'controllin'g the tension of having a' gear segmentarranged to directly engage either plunger independently of the other, said shaft eXtend-ingto the eXterioro f the casing and arranged at its end for engagement With-a movable eooperating' vpart. :In testimony wliereot ltave hereunto signed my name in the presence of tv'vo'sub scribing Witnesses.

i I BLAIR WV. GA'IR. Witnesses: 1

ROY LII-TILL,- CHARLES I; COBB.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of-Patents,

Washington, D. 0. a 

